September weather forecastRieti, Italy
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Rieti, Italy, with an average temperature fluctuating between 22.7°C (72.9°F) and 11°C (51.8°F).Temperature
The decrease of average high-temperatures is mild in September, with a decline from a warm 28.5°C (83.3°F) in August to an agreeable 22.7°C (72.9°F). Rieti experiences an average temperature drop to a cool 11°C (51.8°F) during September nights.Humidity
In Rieti, the average relative humidity in September is 72%.Rainfall
In September, the rain falls for 14.2 days. Throughout September, 41mm (1.61") of precipitation is accumulated. Throughout the year, in Rieti, there are 160.4 rainfall days, and 553mm (21.77") of precipitation is accumulated.Snowfall
In Rieti, Italy, snow does not fall in April through October.Daylight
In September, the average length of the day in Rieti, Italy, is 12h and 29min.On the first day of the month, sunrise is at 06:34 and sunset at 19:42. On the last day of September, sunrise is at 07:05 and sunset at 18:51 CEST.
Sunshine
The average sunshine in September is 10.7h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In September, an average UV index of 4 transforms into the following instructions:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rieti, Italy
- Average high temperature in September: 22.7°C
The warmest month (with the highest average high temperature) is August (28.5°C).
The month with the lowest average high temperature is January (7.3°C).
- Average low temperature in September: 11°C
The month with the highest average low temperature is August (14.1°C).
The coldest month (with the lowest average low temperature) is January (0.1°C).
Average pressure in September
Rieti, Italy
- Average pressure in September: 1015.6mbar
The month with the highest atmospheric pressure is December (1018.5mbar).
The month with the lowest atmospheric pressure is July (1013.9mbar).
Average wind speed in September
Rieti, Italy
- Average wind speed in September: 7.2km/h
The windiest month (with the highest average wind speed) is February (9.6km/h).
The calmest month (with the lowest average wind speed) is August (6.6km/h).
Average humidity in September
Rieti, Italy
- Average humidity in September: 72%
The months with the highest relative humidity are January and November (83%).
The month with the lowest relative humidity is August (63%).
Average rainfall in September
Rieti, Italy
- Average rainfall in September: 41mm
The wettest month (with the highest rainfall) is November (74mm).
The driest month (with the least rainfall) is August (35mm).
Average rainfall days in September
Rieti, Italy
- Average rainfall days in September: 14.2 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is August (9.3 days).
Average snowfall in September
Rieti, Italy
- Average snowfall in September: 0mm
The month with the highest snowfall is February (33mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Rieti, Italy
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Rieti, Italy
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 10h and 42min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The months with the least sunshine are January and February (Average sunshine: 5h and 48min).
Average sunshine days in September
Rieti, Italy
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is August (19 days).
The month with the least sunshine days is May (10.4 days).
Average UV index in September
Rieti, Italy
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Rieti, Italy
- Average cloud cover in September: 23
The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in September
Rieti, Italy
- Average visibility in September: 9km
The month with the highest visibility is August (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, September, October, November and December (9km).
